Improvement in pipe-molding machines



. `,Toaltwliom:tf'magjconceptie; Beit knownthat LGEQRGE RICHARDSON of`Wisconsin, haveinvented certain Improve-` nhereby'declare that thefollowing is a full,

`loeinghad to thel annexed drawings, making .i Figure `1` represents, a:perspective view of P myimprovedmachine. Fig.'2 is a vertical .elongitudinal section thereof. e, Figs. 8 to 9 rep- `resent views of`various parts` of the machine in the designation of identical parts.

molding pipes and pipe-couplings from clay or other 'plastic substances;`and my improvementjconsists `in the construction and combimorespecifically pointed out in the following To enable those skilled in theart to make y scribeits construction" and operation.`

` mounted upon a substantial table, A,provided with a metallic plate, U,at the pointiwhere `the case `ormoldil is to be placed upon it.

i. core O snuglyiits, and `anaperture is also u formed in the top of thetable, to admit ofthe passagelof the said core through it in its vere ii The case or moldB` is cylindrical or of other form upon its interiorsurface, to correspond formed, and may be'of any suitable length. "Themold illustratedin Fig. 3 is used when upon one side, such base beingformed in the "l chamber X, there shown. The mold consists e `7 GEORGE 1eIcHARDsoN, 0F

MILWAUKEE, WISCONSIN.

` lMPReofvEMENriN PIPE-Molema MACHINES.

Speciiication forming part of Letters Patent N 0. {1%,495 dated March7,1871.

ofthe city and county ofMilwaukee andState ments in Pipei-lllolding:`Machines; andI do clear, andexact description thereof, referencepart'o'f this specification, lin which-- in detail: Fig. 10 shows amodification of the means for operating the central cord. .1

The same letters are` usedin all the figures This invention `relates toa machine for nation of various partsthereof, which will be descriptionandclaims. i

and use my'invention, I will proceed'to de- The various parts of theapparatus are This plate has a central opening, in which the ticalmovements.

in reverse to the exterior of the pipes" to be` the pipesa're formedwith a rectangular base of two sections hinged together, so th at it mayplate Uin such manner,and are of such outter. `Thesections are furtherheld in a closed x position by a bolt, W, passing through eyes on thesections.

To the lower end of the central core a rack, F, is `secured in avertical position to .mesh into and be driven by a pinion, G. `Thispinion is keyed to a shaft, H, to which the power maybe `applieddirectly; but as it is located necessarily some distancebelow the top ofthe table it is generally preferred toV drive from a counter-shaft, M,arranged upon the table, the motion of which is transferred to the shaftH by intermediate gearing, or by `pulleys and belts or chains, as shownclearly in Fig. 1. The back of the rack slides in a guide, N', and it isheld together with the core in its highest position by a sliding bolt,N, which moves in an aperture in the slide, and enters a hole in theback of the rack. The bolt N is operated by a lever, O, fulcrumed at O2,and extending up through the top of the table. Instead ot' the rack F,the lower end of the core may carry a straight bar, as shown in Fig. 19,and be operated by means of a cord or chain, one end of which isfastened to the lower end of the bar, and which, after beingwound'several times around the shaft H, is fastened with its other endto the upper end of the bar. By operating the shaft in one direction orthe other the core can be raised or lowered.

The concentricity of the central core C is preserved `by a disk, T,snugly fitting its bore, and having spider1egs T', which, passingthrough notches in the upper end of the core, hook with their bentdownends over the shell of the mold.

The pipes which are intended to be molded in this mold are of theconstruction described in my Letters Patent of September 6, 1870. Theannular recesses in the couplings for these pipes are formed by placinga ring, D, with an annular shoulder in the bottom of mold. After therequired amount of cement or other earthy matter has been properlytamped, the ring S is slipped over the core--the spider T T beingremovedto form the recess inthe upper end 5 or the ring E may be usedfor this purpose, if desired. In order to form lateral openings in thepipes or couplings for the attachment of branches, a core, P or Q, maybe which said core R projects sufficiently to moldl a collar around itby hand. This core' R is either screw-threaded,as shown in Fig. 6, or itmay have a plain cylindrical surface, to form either'a screw-threaded orplain opening. To form a branch opening extending fromthe pipe at anangle other than a right angle,.the branchy core is made to stand atthel required angle to the central core, as shown, for instance, in Fig.7

I am aware that branch openings have #been formed in' pipes-of thisclass by means of lateral c0res;but in every instance these cores wereinserted through an opening inthe-side of the mold, so that it wasnecessary to use=a different mold for every changein the position of thebranch. This difficulty isfovercome by using lateral cores'inserted fromthe top of the mold, as hereinbefore described.

1n molding straight pipes, a ring, Y, is placed in the bottom of themold to support thepipe in being removed from the mold.

After a pipe or coupling has been molded 'in\ the mannerK setforth,tl1e;central core is withdrawn from it, the hinged plates U thrownback, and the mold opened and removed. The pipe isthen liftedfromthetable resting upon the ring Y, and placed in a kiln to be burned.

What I claim asl my invention, and desire to secure by Letters Patent,is-

1. In combination with the central core C, bar F, and guide N', theybolt N andv lever O, substantially as-Iset forth.

2. The arrangement withl referenceto each other of the mold B, centralcore C, and lat` eral' shoulderedcores P Q, substantially as and for thelpurpose set forth.

3. The eorevR, for the purpose of forming a shoulder onthe outsidel ofthe pipe or coupling, around branch openings therein, when arranged andoperating substantially as set forth.

GEORGE RICHARDSON.

Witnesses:

J. B. SMITH, W. M. HoRNoR.

